Evaluation Board Differential Filter | Passive Components

Characteristics

Printed circuit board for evaluation of different EMC-filters
To evaluate and select different filter components for the best possible common and differential mode attenuation for your application
THT (Through Hole Technology) mounting
Components are not included!

Applications

Optimized for attenuation of differential mode noise with simultaneous good common mode attenuation
Suppression of conducted interferences caused, for example, by switch mode power supplies
AC mains applications up to 250V
Important information: This is an evaluation board. The board should not be installed in the final application.

Application Notes

ANP015 Line filter – The last barrier in the switch mode power supply
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Find filter solutions quickly and cost-effectively with the

Evaluation Board

This PCB offers a fast and cost-effective means of building up the filter design with various components. It allows for the examination of the filter circuit's performance in relation to the desired filtering effect, facilitating the seamless integration of the chosen filter circuit into the application. This can reduce development time and the associated costs.

The evaluation board can be used as a supplement to the Design Your EMC-Filter Design Kit or independently with the components shown in the adjacent figure and below.

Go to Design Kit

Common and differential mode attenuation

T filter for common mode suppression

In this circuit, the Common Mode Choke (CMC), the Y-Capacitors (C_Y1, C_Y2) and the Differential Chokes (L₁, L₂) built a low-pass filter. The high frequency interference is filtered while the supply current, which typically has a much lower frequency (50 - 60 Hz), remains almost unaffected.

2 stage LC filter for differential mode suppression

The Y-Capacitors (C_Y1, C_Y2), the Differential Chokes (L₁, L₂), the X-Capacitor (C_X) and the Leakage Inductance (L_Leak) of the Common Mode Choke build a low-pass for high frequency differential mode interferences. While Y-Capacitors divert high-frequency interference via ground and X-Capacitors via N in the direction of the interference source, it is attenuated by the impedance of the Common Mode Choke and the Differential Choke.